Vitamin b12 and vitamin d deficiency.

Hi sir, In last nov i had viral fever and admitted in hospital for 4days platelets count was less that is 1lack 39 thousands after dischargethe from hospital I have full tiredness not able to go to work taken rest for 15days then went to office than again in jan I have done complete body check than I came to know I have vitamin b12(136) and vitamin d(10.18)deficiency I took neurobian injection 10injection weekly one and d-rise powder weekly once 11 packet till now (In middle I was faced anxiety and panic and little chest pain in left side I done ECG 2 times it's normal During discharge my heart rate is 80/min but later after few days itwas 110/min now again I have done vitamin test vitamin b12 is 1166 and vitamin d is 64 In middle I took one architol 6L injection that time I felt little better. Pls support me am struggling from last 5months Now am facing little pain in left side chest, little anxiety and tiredness and sometimes am feeling I will fall down while walking. I done therapy